Eollee mill



2 SheetsSheet 1.

(No Model.)

- N. W. HOLT.-

ROLLERMILL. 4 I

Patented Qot. 9 1883.

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N. PETERS. Mum y, Wnnlum D. c.

(No Model.) 2 Sheets-Sheet 2.

N. W. HOLT.

ROLLER MILL.

No. 286,440. Patented Oct. 9 1888.

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I city of Buffalo, in the county of Erie and State ongan enlarged scale, in line 1 Fig. 1.

llmrso NOAH W'. HOLT, OF BUFFALO, NElY YORK.

ROLLER-MILL.

SPECIFICATION forming part of Letters Patent No. 286,440, dated October 9, 1883.

Application filed March 13, 1883. (No model.)

To all whom it may concern.-

Be it. known that I, NOAH W. HOLT, of the of New York, have invented new and useful Improvements in Roller-Mills, of which the following is a specification.

This invention relates to an improvement in that class of roller-mills which are employed in the reduction of grain and other similar substances, and has for its object to provide means for separating the rollers, when necessary in starting and stopping the mill, without disturbing the adjustment of the rollers, and at the same time permit both bearings of the movable roller to be finely adjusted both simultaneously and separately.

My invention consists of the mechanism whereby these results are attained, and which will he hereinafter fully set forth, and pointed out inthe claims.

In the accompanying drawings, consisting of two sheets, Figure 1 is an end elevation of a portion of a roller-mill to which my improved adjusting mechanism is applied. Fig. 2 is a top plan view of the adjusting mechanism, with parts of the roller mill in section. Fig. 3 is a side elevation of the adjusting mechanism. Fig. 4 is a vertical. section in line a: a: of Fig. 2. Fig? 5 is a sectional view,

Like letters of reference refer to like parts in the several figures.

A A represent the two rollers of the rollermill; a a, the journals of the rollers, and a a. the hearings in which the journals turn. The bearings a? a are made adjustable toward and from the roller A, to regulate the distance between the workingfaces of the rollers.

B represents the frame of the roller-mill, and I) the horizontal ways on which the bearings (6 a are moved toward and from the roller A.

c is a horizontal screw-bolt, which engages with its inner'threaded end in a threaded opening in the bearing a, and which passes through a horizontal sleeve, d, and is provided at the outer end of the said sleeve with a handwheel, D.

e represents a spiral or other suitable spring, which surrounds the screw-bolt c, andwhich is interposed between the bearing a and aunt,

0, applied to the inner portion of the sleeve (1, the latter being provided with an external screw-thread for that purpose.

F represents a screw-threaded sleeve, which surrounds the threaded sleeve d. F is screw-threaded b oth externally and in ternally, the two threads being cut in op posite direct-ions, the innerthread engaging with the external thread of the sleeve (1, and the outer thread with an internal thread out into a lug, f, cast with or secured to the frame B. As shown in the drawings, the external thread of the sleeve d is a left-hand thread and the external thread of the sleeve F is a right-hand thread. The spring 6 presses the bearing (1? toward the roller A, and holds the hand-wheel D against the outer end of the sleeve (Z. By turning the hand-wheel l) the bearing a. is adjusted toward or from the roller A.

g is an arm secui'cd to or formed with the sleeve F, for turning the same in the threaded socket f. By turning the sleeve F in one or the other direction it is moved toward or from the roller A, and the sleeve d not only follows these movements of the sleeve F, but receives an additional axial movement in the same direction by the engagement of the internal thread of the sleeve F with the external thread of the sleeve so that if both threads are of the same pitch the axial movement of thesleevc d will be twice as long as that which is produced by the movement of the sleeve F alone. The sleeve (1 is held against axial rotation by the pressure of the spring 6 against the nut e. In moving the bcaringc" toward or from the roller A, by turning the sleeve F in, the threaded lug j, the relative position of the threaded sleeve (1, nut 6', spring 6, and bearing a remains undisturbed, so that this movement is effected irrespective of the adjustment which is due to the'position of these parts, and without distending or compressing the spring 0.

Each of the bearings a is provided with the adjusting contrivances just described, and the two arms 9 of the adjusting contrivances at both ends of the movable roller A are connected by a rod, 72-, whereby both devices can 10o be moved simultaneously, so as to effect the same adj ustment at both ends of the roller at The sleeve" the same time. The rod h is moved by a hand-lever, I, which is pivoted to the frame B at i, and connected with the rod h by a rod, j. The rod jis connected with the rod -h by a collar, 70, which surrounds a sleeve, L. The latter is provided with an internal screwthread, which engages with an external thread cut on the rod h. In order to facilitate the application of the threaded sleeve L to the rod h, the latter is divided in the sleeve, as represented in Fig. 5. j

The collar is seated between shoulders Z and Z 011 the sleeve L, which permits the sleeve L to turn in the collar and compel it to follow the movements of the collar in the direction of the rod ii. If the rollers are in their working position when the lever and connecting parts are in the position indicated in full lines in Fig. l, the roller A will be separated from the roller A by swinging the lever into the position indicated by dotted lines. The movement of the lever I is transmitted by the rods 9' and h to the arms g of the adjusting devices, and causes the same movement in the bearings 64 When the parts are in the position shown in full lines in Fig. 1,-with the rollers in their working position, the lever I rests upon the adjacent sleeve d, and the point at which the rod j is connected with the lever I lies in or below a straight line drawn from the fulcrum 0f the lever I to the point at which the rod j is attached to the rod h, whereby the parts are securely locked in this position. The movement of the lever Iis arrested when it reaches the position shown in dotted lines in Fig. 1, by a nose, m, of the levei coming in contact with a stop, m, on the frame B. Upon turning the threaded sleeve L in the collar is, the rod h receives an axial movement in one or the other direction, which movement is trans mitted by the arms g to the sleeves d, and whereby both bearings are simultaneously adjusted. By turning the hand-lever I the rollers are separated for starting and stopping the mill. By turning the threaded sleeve L both bearings are simultaneously adjusted, and by turning either of the hand-wheels D each bearing is separately adjusted, and each of these adjustments or movements is affected without disturbing any of the existing other adj ustments. The pressure of the adjusting-screws is exerted in the direction in which the rollerbearings a move and in parallel lines at both ends of the roller A, thereby preventing binding of the adjusting parts. The springs c are not compressed when the rollers are thrownapart, and the rollers can therefore be left in this position for a long period of time without in any manner affecting the tension of the springs.

The roller-bearing a" is provided with an eccentric adj usting-piece, a, seated in a recess, a, in the bearing (6 below the lining 0, in which the journal or turns. The ripper face of the adjusting-piece n is made concentric with the lining 0, and the lower face is made eccentric thereto, as shown in Fig. 4. The adjustingpiece a is adjusted and held in position by setscrews p and 1). Upon moving the adjustingpiece it in one or the other direction, after .loosening the bolts q, which secure the cap of the bearing to the body thereof, the lining o is slightly raised or lowered. By this means a very fine vertical adjustment can be effected at either end of the roller A.

I claim as my invention 1. The combination, with the bearings of the movable roller, of mechanism whereby each bearing can be separately adjusted, mechanism whereby both bearings can be simulta neously adjusted, and mechanism whereby both bearings can be moved simultaneously to separate the rollers without disturbing the adjustment of the bearings and without compressing the springs applied to said bearings, substantially as set forth.

2. The combination, with a bearing, of an adjusting bolt, 0, an externallythreaded sleeve, d, aspring interposed between the hearing and a shoulder on the sleeve (2, a lug, f, and an adjustable sleeve, F, through which the sleeve d passes, and which produces an axial movement of the sleeve (Z and connecting parts by its rotary movement, substantially as set forth.

3. The combination, with the bearings of the movable roller, of the screw-threaded bolts a, threaded sleeves d, springs c, interposed between said bearings and shoulders on the sleeves d, sleeves F, connecting with the threaded sleeves d, and provided with arms g, and a connecting-rod, h, whereby the sleeves F at I both ends of the roller are operated simultaneously, substantially as set forth.

4. The combination, with the sleeves F and adjusting contrivances connecting said sleeves with the bearings of the movable roller, of

arms connecting-rod h, and means, substantially as described, whereby said connectingrod can be moved in either direction for ad- IIO justing both bearings of the movable roller simultaneously, substantially as set forth.

5. The combination, with the bearings of the movable roller, of the sleeves F, provided with arms 9, means whereby said sleeves are 0011- nected with the roller-bearings, threaded connecting-rod h, threaded sleeve L, collar k, connecting-rod j, and hand-lever I, substantially as set forth.

6. The combination, with a bearing composed of a body secured to the frame of the machine, and a cap detachably secured to said body, of a loose lining, 0, an adjusting-piece, a, constructed with a concentric and eccentric face, and set-screws p 9, substantially as set forth.

I NOAH W. HOLT. itnesses: I

J No. J. BONNER, OHAs. F. GEYER. 

